CN102554112A - Forging method for martensitic stainless steel pressure springs of nuclear power equipment reactor internals - Google Patents
Forging method for martensitic stainless steel pressure springs of nuclear power equipment reactor internals Download PDFInfo
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- CN102554112A CN102554112A CN2010105825943A CN201010582594A CN102554112A CN 102554112 A CN102554112 A CN 102554112A CN 2010105825943 A CN2010105825943 A CN 2010105825943A CN 201010582594 A CN201010582594 A CN 201010582594A CN 102554112 A CN102554112 A CN 102554112A
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Abstract
The invention discloses a forging method for martensitic stainless steel pressure springs of nuclear power equipment reactor internals. 17-21 tons of electroslag ingots are used as raw materials, the diameter of each electroslag ingot is phi 1300-1500mm, and the length of each electroslag ingot is 1630-2020mm. The forging method includes the steps: firstly, drawing each electroslag ingot to reach phi 1100mm by using a 28MN hydraulic press; secondly, heading by using a 165MN hydraulic press and then punching by using a hollow punch of phi 650mm; thirdly, primarily chambering a mandrel of phi 600mm to reach phi 1600mm by using the 165MN hydraulic press; and fourthly, secondarily chambering the mandrel of phi 1200mm to reach phi 2900-3200mm by using the 165MN hydraulic press. The forging method can be used for effectively solving the problem of difficulties in manufacturing the pressure springs, and all-round performances of the manufactured pressure springs meet requirements.
Description
Technical field
The present invention relates to a kind of method for forging and molding of nuclear power generating equipment, be specifically related to a kind of method for forging and molding of nuclear power generating equipment in-pile component martensitic stain less steel holddown spring.
Background technology
Nuclear power more and more receives people's favor as clean energy resource, but the problem that the safety of nuclear power is people to be concerned about the most, and the part quality of composition nuclear power station is the assurance of nuclear plant safety.Holddown spring is the major part of nuclear island of nuclear power station main equipment in-pile component, and is especially high to its each performance demands.
Nuclear in-pile component holddown spring forging adopts martensitic stain less steel, and its manufacture difficulty mainly is: 1, the strength of materials and hardness are very high, is difficult for forging; 2, forging range is narrower, and forging time is shorter relatively; When 3, forging, easy of crack; Circularity is wayward when 4, forging.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method for forging and molding of nuclear power generating equipment in-pile component martensitic stain less steel holddown spring, the martensitic stain less steel holddown spring forging that it can obtain, and institutional framework is uniform and stable, excellent performance, size meet the demands.
For solving the problems of the technologies described above, the technical solution of the method for forging and molding of nuclear power generating equipment in-pile component martensitic stain less steel holddown spring of the present invention is:
With 17～21 tons ESR ingots is raw material, and the diameter of ESR ingot is Φ 1300～1500mm, and long 1630～2020mm may further comprise the steps:
The first step, pulling;
ESR ingot is heated to 1200 ± 10 ℃, insulation; Pull out 1100mm with the 28MN hydraulic press to Φ; Excise bottom and rising head then; Forging ratio >=1.4;
The excision of bottom and rising head is than >=3%.
Second step, jumping-up, punching;
Melt down and be heated to 1200 ± 10 ℃, insulation; With 165MN hydraulic press jumping-up; Hollow punch with Φ 650mm carries out punching then; Forging ratio >=4.3;
The 3rd step, a reaming; Melt down and be heated to 1200 ± 10 ℃, insulation; Use the 165MN hydraulic press, the plug reaming of Φ 600mm is to Φ 1600mm;
The 4th step, second reaming; Use the 165MN hydraulic press, with Φ 1200 plug reamings to Φ 2900～3200mm;
Total forging ratio >=2.2 in the 3rd step and the 4th step.
Said the 3rd step and the 4th is rotated reaming with forging manipulator clamping plug batch (-type) when going on foot reaming.
The technique effect that the present invention can reach is:
The present invention can solve each manufacturing difficult point of holddown spring well, and the performance of the each side of the holddown spring of manufacturing all meets the requirements.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed explanation:
Fig. 1 is the sketch map of 17～21 tons of ESR ingots of raw material of the present invention;
Fig. 2 is the sketch map that utilizes the nuclear power generating equipment in-pile component martensitic stain less steel holddown spring forging of manufacturing of the present invention;
Fig. 3 is the flow chart of the method for forging and molding of nuclear power generating equipment in-pile component martensitic stain less steel holddown spring of the present invention.
The specific embodiment
As shown in Figure 3; The method for forging and molding of nuclear power generating equipment in-pile component martensitic stain less steel holddown spring of the present invention is a raw material with 17～21 tons ESR ingot as shown in Figure 1, and the diameter of ESR ingot is Φ 1300～1500mm; Long 1630～2020mm may further comprise the steps:
The first step, pulling;
ESR ingot is heated to 1200 ± 10 ℃, insulation; Pull out 1100mm with the 28MN hydraulic press to Φ; Excision bottom and rising head excise than >=3% then; Forging ratio >=1.4;
Second step, jumping-up, punching;
Melt down and be heated to 1200 ± 10 ℃, insulation; With 165MN hydraulic press jumping-up on circular shim; Use hollow punch punching on drain cap of Φ 650mm then; Forging ratio >=4.3;
The 3rd step, a reaming; Melt down and be heated to 1200 ± 10 ℃, insulation; Use the 165MN hydraulic press, the plug reaming of Φ 600mm is to Φ 1600mm, the end face of smooth ring;
The 4th step, second reaming; Use the 165MN hydraulic press, to Φ 2900～3200mm, forging ' s block dimension as shown in Figure 2 completes with Φ 1200 plug reamings.
The 3rd step and the 4th is rotated reaming with forging manipulator clamping plug batch (-type) when going on foot reaming.
Total forging ratio >=2.2 in the 3rd step and the 4th step.
Forge by above step, according to RCC-M M380 criterion calculation, the inner structure property of forging can effectively be improved in total forging ratio >=7.
Claims (3)
1. the method for forging and molding of a nuclear power generating equipment in-pile component martensitic stain less steel holddown spring is characterized in that, is raw material with 17～21 tons ESR ingots, and the diameter of ESR ingot is Φ 1300～1500mm, and long 1630～2020mm may further comprise the steps:
The first step, pulling;
ESR ingot is heated to 1200 ± 10 ℃, insulation; Pull out 1100mm with the 28MN hydraulic press to Φ; Excise bottom and rising head then; Forging ratio >=1.4;
Second step, jumping-up, punching;
Melt down and be heated to 1200 ± 10 ℃, insulation; With 165MN hydraulic press jumping-up; Hollow punch with Φ 650mm carries out punching then; Forging ratio >=4.3;
The 3rd step, a reaming; Melt down and be heated to 1200 ± 10 ℃, insulation; Use the 165MN hydraulic press, the plug reaming of Φ 600mm is to Φ 1600mm;
The 4th step, second reaming; Use the 165MN hydraulic press, with Φ 1200 plug reamings to Φ 2900～3200mm;
Total forging ratio >=2.2 in the 3rd step and the 4th step.
2. the method for forging and molding of nuclear power generating equipment in-pile component martensitic stain less steel holddown spring according to claim 1 is characterized in that: said the 3rd step and the 4th is rotated reaming with forging manipulator clamping plug batch (-type) when going on foot reaming.
3. the method for forging and molding of nuclear power generating equipment in-pile component martensitic stain less steel holddown spring according to claim 1 is characterized in that: the excision of said first step excision bottom and rising head is than >=3%.
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| CN201010582594.3A CN102554112B (en) | 2010-12-10 | 2010-12-10 | Forging method for martensitic stainless steel pressure springs of nuclear power equipment reactor internals |
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| CN102554112B CN102554112B (en) | 2015-04-22 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433279A (en) * | 2013-06-30 | 2013-12-11 | 贵州安大航空锻造有限责任公司 | Roll forming method for Martensite stainless steel large-sized thin-wall ring part |
| CN104338882A (en) * | 2013-08-07 | 2015-02-11 | 上海重型机器厂有限公司 | Forming method of motor enclosure forging of third-generation nuclear power coolant pump |
| CN106825344A (en) * | 2017-02-16 | 2017-06-13 | 哈尔滨汽轮机厂有限责任公司 | A kind of free forging method that male sportsman sealing ring is realized using 1 ton of flat-die hammer |
| CN107363214A (en) * | 2017-07-13 | 2017-11-21 | 江阴南工锻造有限公司 | A kind of long valve body punching pulling forging technology |
| CN111570689A (en) * | 2020-04-28 | 2020-08-25 | 攀钢集团江油长城特殊钢有限公司 | Forging method of barrel |
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| CN101653814A (en) * | 2008-08-22 | 2010-02-24 | 襄樊市襄城新兴轴承锻造厂 | Double-expansion process of super-large-inside-diameter forgeable pieces |
| CN101850397A (en) * | 2009-03-31 | 2010-10-06 | 上海重型机器锻件厂 | Forging method of large-scale circular cylinder body and three-point anvil adopted by same |
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| CN101653814A (en) * | 2008-08-22 | 2010-02-24 | 襄樊市襄城新兴轴承锻造厂 | Double-expansion process of super-large-inside-diameter forgeable pieces |
| CN101850397A (en) * | 2009-03-31 | 2010-10-06 | 上海重型机器锻件厂 | Forging method of large-scale circular cylinder body and three-point anvil adopted by same |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433279A (en) * | 2013-06-30 | 2013-12-11 | 贵州安大航空锻造有限责任公司 | Roll forming method for Martensite stainless steel large-sized thin-wall ring part |
| CN103433279B (en) * | 2013-06-30 | 2015-07-29 | 贵州安大航空锻造有限责任公司 | The roll-forming method of martensitic stain less steel large thin-wall annular element |
| CN104338882A (en) * | 2013-08-07 | 2015-02-11 | 上海重型机器厂有限公司 | Forming method of motor enclosure forging of third-generation nuclear power coolant pump |
| CN104338882B (en) * | 2013-08-07 | 2016-08-10 | 上海重型机器厂有限公司 | The forming method of generation Ⅲ nuclear power cooling medium pump motor casing forging |
| CN106825344A (en) * | 2017-02-16 | 2017-06-13 | 哈尔滨汽轮机厂有限责任公司 | A kind of free forging method that male sportsman sealing ring is realized using 1 ton of flat-die hammer |
| CN107363214A (en) * | 2017-07-13 | 2017-11-21 | 江阴南工锻造有限公司 | A kind of long valve body punching pulling forging technology |
| CN107363214B (en) * | 2017-07-13 | 2019-05-10 | 江阴南工锻造有限公司 | A kind of long valve body punching pulling forging technology |
| CN111570689A (en) * | 2020-04-28 | 2020-08-25 | 攀钢集团江油长城特殊钢有限公司 | Forging method of barrel |
| CN111570689B (en) * | 2020-04-28 | 2022-03-22 | 攀钢集团江油长城特殊钢有限公司 | Forging method of barrel |
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| CN102554112B (en) | 2015-04-22 |
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Effective date of registration: 20161130 Address after: 200245 Jiangchuan Road, Shanghai, No. 207, building 1800, No. Patentee after: Shanghai Electric Heavy Forging Co. Ltd. Patentee after: Shanghai Heavy Machines Plant Co., Ltd. Address before: 200245 Jiangchuan Road, Shanghai, No. 1800, No. Patentee before: Shanghai Heavy Machines Plant Co., Ltd. |